Heated paving-roller



UNITED STATES simplicity,

PATENT OEFCE;

WALTERE. DENNISCN, oF SAN FRANCISCO, CALIFORNIA.

`HEATED. PAVING-ROLLER.`

sPEoIFIoA'rlroN forming part of Letters Patent No. 524,939, dated August 21, i894.

' Application tiled December 16, 1893. Serial No. 493.8145. (No model.) l

To @ZZ whom, it may concern,.-

. Be it known that I, WALTER E. DENNIsoN, a citizen of the United States, residing in ,the city and coun ty of San Francisco, State of California, have invented certain new and useful Improvements in Heated Paving-Rollers, of which the followingis a specification.

My invention relates to improved means for heating streebpavin g and road-makin g rollers of the kind or description which are used in laying and nishing asphaltum and bituminous-rock pavements. Rollers of this class, at the present time, are' commonly heated by means of a swinging grate oryfire-pan Suspended from the axle within the central hollow space of the roller and a fire of lcoal or wood fuel; but this mode of heating is imperfect and objectionable -in several respects, principallyT on account of the difficulty of keeping the roller properly heated and of maintaining an even and uniform condition of heat at all times, but also on account of the y expense attending the careless and extrava` gant use of fuel and the loss of the workmans time through the frequent interruptions and delaysoccasioned by renewing and replenishing the re. Y A

My present invention has forits object to `provide roller-heating means or apparatus having none of these defects and objections and possessing, besides, the advantages of cleanliness, economy in' the cost consumption of fuel i `and'regularity of operation.

To such ends and objects my invention con-` sists in the described construction and combination of heating apparatus for street-rollers, consisting of a tank or reservoir to contain gasoline or other similar liquid mounted on the roller-frame or carriage, a set of burners inside the roller with conducting pipes and connections between the burners and the tank outside the roller and regulating valves or cocks to control the flow of the liquid to the burners, substantially as hereinafter explained.

The invention consists also in a heated roller for street-work having a gasoline-tank mounted on its frame or carriage,a hollow axle, a set of gasoline burnersr connected to and supported by said axle and pipes eon- 1 nesting said hollow axle inside the roller with thev supply tank outside and cocks or valves to control the flow of gasoline through the pipes to the burners, as hereinafter described and pointed out in the claims.

Referring to the accompanying drawings forming a part of this speciticatiom-Figure l is a cross-.section of the rollertaken verti-lY oallythrough the middle. tudinalsection, looking toward the front of Fig. 2 is a longithe roller. Fig. 3 is a horizontal section taken longitudinally th rough the middle of the roller,-

jiist above the axle. Fig. 4E is a view in perspective on `an enlarged scale of a portion "of the hollow axle and a set of burners and their supporting and connecting pipes.

. -A- indicates the body of a roller such as is generally used vat the present ,timefiiiA the work of laying asphaltum andwbitluminousrook pavements, having open ends with spokes or arms -aX- and hubs -a2- for the axle.

Lwhich the end of the stand-pipe is connected or coupled in such manner that the pipe forms a conductor for the liquid in the tank.

'.-Ff is a cock or valve in the pipe D for controlling the flow of the liquid;

-G-G-e are pipes of smaller bore than the stand-pipe connected `to the lower en d of that pipe and branching thence in opposite digrestions to the sides of the roller and extending backward along the yoke to the ends of the axle. The branch pipesare fixed in the axle by screwing their threaded ends into plugs or bushings fixed in the ends of the axle, or by any other means to secure tight Joints.

ffl-H are two sets of burners of a kind suitable for burning gasoline. The burners Ihave used with good results are the kind composed of a hollow, circular head -hX-, a contracted neck A722 below the head and a tubular extension or body h3 below the neck, with a circular row of perforations/ -B is the axle and dC- is the yoke or burns .in `numerous jets. y A needle valve -h4 in-thebod'yof the burner controls the flow of fluid which is fed in through a tube heat is distributed uniformly or evenly across the roller and against the entire length of its rim or body. The two pipes -K- are fixed at points on the axle about one-fifth the'y distance from each end, and the`branch-J- ,gp of each pipe is turned by an elbow'at right \l` angle, as shown more particularly in Fig. 3', jso that the burner on its end will occupy a ,position about the same distance from the 'burner-on theoppositef straight branch -I z5 `vmeasuring along the axle as that burner occupies from the end of the roller. The like branch -J-' of the other set is turned in thefsame manner to' stand at right angle and substantially parallel with the axle toward theother bent branch before mentioned, so that the space or distance between onebu-rner and the next is about` one-fifth of the length along theax-le'. Thus by means of 'pipes -K- and the branches -I-J- as many sctso burners are connected to the axle as are required to heat the roller, without multiplying the pipes and connections. In arranging these parts for use on the ordinary paving-roller, which has central hubs for'the axles united to the rim by radial arms or spokes, the interior space being open tothe outside through the openingsbetweenztlie arms, it-is necessary to close up these openingsA in order to reduce the circulation throughthe roller` and reduce the supply of air from the' outside to the burners, as other# wise theheat will not be c'onned withinthe body of the rollernor' applied in the manner to securegood results. I thereforev close the openings between the arms or spokes at both two sets of burners in such 'position that theends by fixing` sheet metal heads -M- in theends of the roller, and making in these heads between the spokes apertures mm to admit air in sufficient quantity to the burners without allowing a free circulation or a strong draft through the roller. One of these apertures I usually make'larger than the others in one head to afford access to the burners forlighting and regulating them.

Having thus fully described my invention, what I claim as new, anddesire to secure by l. The herein described paving-roller cornprising aA metal rimv inclosing a hollow space having closed heads provided with apertures `for admission of air, and `central hubs for an axle, ai frame or carriagefhaving'a fixed tubular axle on which therollerrotates, a tank for a liquid, as gasoline, mounted on'the frame outside the` roller, supply-pipes connecting the *tubularV a-xlewith the rtank, pipes inside the roller 'connected to'thetub'ular axle at pointsalong .the length thereof 'and' extending therefrom substantially at' right angleto said axle and burners- 'x'e'd` on said pipes in -close relation to the innerl periphery of the roller-rim, and regulating valves inthe supply-pipes, substantially' asI hereinbefore set 2. The combination, with' a1 hollowfpavingroller in an operating-frame, having closed J heads or ends'provided withapertures to reguflate the admission of air, of a stationary hollow-axle on which the roller is setfor rotation, a gasoline-tank mounted on said frame, sup-V ply-pipes connecting the ends of the tubular 1. axle with the tank, branch-pipes fixed in the 1 tubular-axle extending substantially perpendicular thereto, gasoline-burnersr tixedon the :said branch-pipes and vregulating-valves on v'the supply-'pipes for controlling the fiow of liquid from the tank to the burners, constructed for operation substantially as hereinb'eforeset forth. e

In testimony that Il claim the foregoing I have hereunto set my hand and seal.-`

n WALTER E. DENNISON.

Witnesses:

EDWARD E. OsBoRN, LEE D. CRAIG. 

